Computer issues..

Well I haven't been on here in awhile. We've been having computer issues. About a week or more ago, our computer started acting funny and wasn't opening up things. We took it to a computer place in town, and found out that we had a virus on our computer. They kept it for about a week. They called it the Norton killer. I was confused since we had Norton ( software to protect the computer from viruses) but this is when they told us it could kill the Norton. They called on a Friday afternoon, and said they fixed it. I go and pick it up, come home hook it up and Boom, it still wasn't working right. Doing something a little different but still wasn't working correctly. I call AT&T to make sure it isn't our internet. After being on the phone with them over a hour, they figured out that our Firewall was set up to high. So Deon took it back to the computer place Monday, and stayed this time to make sure it was truly fixed. Come to find out the type of Norton software we had was a cheaper version and it had caught the virus but did not know what to do with it and then held the virus so it wouldn't get out and shut everything else down. It also set our Firewall up way high.
They did fix it this time and got a new antivirus (the newer Norton version) and so far so good. The computer is way faster, and seems to be working smoothly.